SPIRV-Tools/source/opt/process_lines_pass.h

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// Copyright (c) 2018 The Khronos Group Inc.
// Copyright (c) 2018 Valve Corporation
// Copyright (c) 2018 LunarG Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_OPT_PROPAGATE_LINES_PASS_H_
#define SOURCE_OPT_PROPAGATE_LINES_PASS_H_
#include "source/opt/function.h"
#include "source/opt/ir_context.h"
#include "source/opt/pass.h"
namespace spvtools {
namespace opt {
namespace {
// Constructor Parameters
static const int kLinesPropagateLines = 0;
static const int kLinesEliminateDeadLines = 1;
} // anonymous namespace
// See optimizer.hpp for documentation.
class ProcessLinesPass : public Pass {
using LineProcessFunction =
std::function<bool(Instruction*, uint32_t*, uint32_t*, uint32_t*)>;
public:
ProcessLinesPass(uint32_t func_id);
~ProcessLinesPass() override = default;
const char* name() const override { return "propagate-lines"; }
// See optimizer.hpp for this pass' user documentation.
Status Process() override;
IRContext::Analysis GetPreservedAnalyses() override {
return IRContext::kAnalysisDefUse |
IRContext::kAnalysisInstrToBlockMapping |
IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
IRContext::kAnalysisNameMap | IRContext::kAnalysisConstants |
IRContext::kAnalysisTypes;
}
private:
// If |inst| has no debug line instruction, create one with
// |file_id, line, col|. If |inst| has debug line instructions, set
// |file_id, line, col| from the last. |file_id| equals 0 indicates no line
// info is available. Return true if |inst| modified.
bool PropagateLine(Instruction* inst, uint32_t* file_id, uint32_t* line,
uint32_t* col);
// If last debug line instruction of |inst| matches |file_id, line, col|,
// delete all debug line instructions of |inst|. If they do not match,
// replace all debug line instructions of |inst| with new line instruction
// set from |file_id, line, col|. If |inst| has no debug line instructions,
// do not modify |inst|. |file_id| equals 0 indicates no line info is
// available. Return true if |inst| modified.
bool EliminateDeadLines(Instruction* inst, uint32_t* file_id, uint32_t* line,
uint32_t* col);
// Apply lpfn() to all type, constant, global variable and function
// instructions in their physical order.
bool ProcessLines();
// A function that calls either PropagateLine or EliminateDeadLines.
// Initialized by the class constructor.
LineProcessFunction line_process_func_;
};
} // namespace opt
} // namespace spvtools
#endif // SOURCE_OPT_PROPAGATE_LINES_PASS_H_